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प्रश्न
Tick (√) the correct alternative from the choice given for the following statement
A pop sound is heard when a lighted match stick is brought near the mouth of a jar. This indicates the release of gas.
पर्याय
oxygen
hydrogen
nitrogen
water-vapour
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उत्तर
hydrogen
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संबंधित प्रश्न
Classify the following as chemical or physical change:
Dissolving common salt in water.
Classify the following as chemical or physical change:
Burning of paper and wood
Photosynthesis cannot take place at night.
State whether the following is physical or chemical changes.
respiration in living beings —
State whether the following is physical or chemical changes.
(energy produced) dissolving sugar in water —
Separate the following into physical and chemical changes :
Sublimation of a solid, Decomposition of water into hydrogen and oxygen by passing electric current, Formation of clouds, Making a fruit salad from raw fruits, Dissolving carbon dioxide in water
Which of the following are physical changes and which are chemical changes ?
Rusting of iron
Give four difference between physical and chemical changes.
Natural changes which take place in nature on their own, are beyond the control of human being.
______ is the Universal Solvent.
